Finding the Fourth Proportional to 3,899.99, 5,368.43 and 3,401.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899.99 : 5,368.43 = 3,401.76 : x
2. Step 2: Convert to fraction form
   3,899.99/5,368.43 = 3,401.76/x
3. Step 3: Cross multiply
   3,899.99x = 5,368.43 × 3,401.76
4. Step 4: Simplify right side
   3,899.99x = 18,262,093.43
5. Step 5: Solve for x
   x = 18,262,093.43/3,899.99
6. Step 6: Final answer
   x = 4,682.60